from time import sleep

from selenium import webdriver

driver = webdriver.Firefox()
driver.get('https://www.baidu.com/')

driver.find_element_by_partial_link_text('新闻').click()
sleep(3)

hds = driver.window_handles
print(hds)
print(len(hds))
print(driver.current_window_handle)

driver.switch_to.window(hds[1])
sleep(2)
driver.find_element_by_partial_link_text('军事').click()
driver.find_element_by_partial_link_text('叙利亚俄军车遭突袭猛击').click()
sleep(2)

driver.switch_to.window(hds[0])
sleep(2)
driver.find_element_by_id('kw').send_keys('Selenium')
sleep(2)
driver.find_element_by_id('su').click()
sleep(2)

driver.quit()
